Project Calico's mission is to provide an open pure L3 approach to virtual networking for highly scalable data centers that integrates seamlessly with could orchestration systems (such as OpenStack) to enable secure IP communication between virtual machines, containers, or bare metal workloads.
The best thing about Calico is its simplicity. It works at L3 and has no encapsulation overhead, making it an efficient and a very scalable networking solution for containers.
What do you dislike?
While we can implement policies for security using Calico but it is not possible to have end-to-end packet encryption. Istio can be a solution for this problem but we haven't yet explored it yet.
Recommendations to others considering the product
If you are you going for simplicity and scalability, Calico is your way to go.
What business problems are you solving with the product? What benefits have you realized?
Our client needed a container networking plugin for their Kubernetes cluster which should be highly scalable, easier to debug and minimum networking overhead. Since Calico perfectly met their requirements, it was very easy to go with Calico.
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